lkml.org 
[lkml]   [2015]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1
On 02/27/2015 02:50 AM, Ard Biesheuvel wrote:
> On 27 February 2015 at 03:20, Timur Tabi <timur@codeaurora.org> wrote:
>> On 02/25/2015 02:39 AM, Hanjun Guo wrote:
>>>
>>> Changes since v8:
>>
>>
>> I'm still debugging it, but v9 on the 4.0-rc1 kernel crashes after calling
>> the UEFI boot time services exit function. That is, this line:
>>
>> status = sys_table->boottime->exit_boot_services(handle, mmap_key);
>>
>> in allocate_new_fdt_and_exit_boot() gets called, and then soon after it
>> returns, the kernel crashes. It's really early because the UEFI exception
>> handler is called.
>>
>> I did not have this problem with v8 patchset on 3.19.
>>
>
> Are you not seeing this on v4.0-rc1 without the patchset applied?

You're right -- I get the same crash even without the patchset applied.

> Could the crash be inside the subsequent call to
> SetVirtualAddressMap() instead of inside ExitBootServices()?

It looks that way. I'm going to have to debug that.

> If so, you have a firmware bug: Mark Rutland spotted a similar bug in
> the AMD Seattle firmware, which has been fixed in the mean time.
> It has to do with the firmware dereferencing the virtual mapping as it
> is being installed, which violates the UEFI spec.

Thanks.

--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.


\
 
 \ /
  Last update: 2015-02-27 22:41    [W:0.211 / U:0.588 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site